The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 26, 2024
Filed:
Mar. 22, 2021
Faber-castell Ag, Stein, DE;
Reiner Appel, Gnotzheim, DE;
Joachim Kinzel, Stein, DE;
Silke Bachmann, Nuremberg, DE;
Gerhard Lugert, Nuremberg, DE;
FABER-CASTELL AG, Stein, DE;
Abstract
The invention relates to a graphite lead or graphite chalk or graphite block for drawing and painting, having a base body made of a base mass at least containing a cellulose-based binding agent, a filler, and graphite, the base body being impregnated with a waterproof preparation mixture containing at least a mixture of iso-paraffins and n-paraffins or a water-soluble preparation mixture containing at least a water-soluble emulsifier. The invention also relates to a pencil with such a graphite lead and to a method for producing a graphite lead or graphite chalk or a graphite block.